Importance

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Abstract

A method for the synchronization of systems for seismic surveys, wherein the systems are composed of subsystems and may be land-based or marine, consists in the survey system being supplied with an absolute time standard and in a time code based on the absolute time standard being generated in the survey system. There is further provided at least one programmable event generator in the survey system and this is synchronized with the absolute time standard. The time for a specific event is predetermined on the basis of given parameters and supplied with the time code which corresponds to this time. The time for a determined event is then supplied to the subsystems which are also provided with the absolute time standard. The event can thereby be executed in one or more of the subsystems on the basis of the supplied absolute time standard and a synchronization is obtained with the desired accuracy. The method can further be used for synchronizing shot times in a seismic signal generating system, and synchronizing the shot recording time and sampling times in a seismic data recording system. The method can also be used for determining the exact time of actually occurring events in a system for seismic surveys.

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First Claim